Officials from the federal Transportation Security Administration also are still reviewing the airport’s new security plan, which must be approved before G4S can take over, Fisher said.

The airport authority is negotiating the final details of a $2.5 million annual contract with G4S, which is expected to save about $1.7 million, said Bill Ryan, chief of staff for Mayor Stephanie Miner.

The authority originally planned to have G4S take over June 1.

“I think we’re on a solid path to getting this done . . . by July 1st,” Fisher said.